#main{
    width: 980px;
    margin: 0 auto;
}
#nav ul li a{
    text-decoration: none;
    display: inline-block;
    line-height: 50px;
    margin: 0 20px 0 20px;
    font-size: 16px;
    font-family: 微软雅黑,'Times New Roman', Times, serif;
    color: #fff;
}
#nav ul li.n:hover{
    background: #882169;
    color: #fff;
    cursor: pointer;
   /* opacity:0.4;
    filter:alpha(opacity=40);*/
}
.item a{
    text-decoration: none;
    color: #000;
}
#exitBtn:hover{
    cursor: pointer;
    text-decoration: underline;
}